Description of the use of Place Keyword Assistant, a software tool, for tagging metadata with geographic names from standardized lists or controlled vocabularies. Includes instructions on use and downloading software files.

Detailed publication on the classification system for an inventory of wetlands and deepwater habitats of the United States used to describe ecological taxa and arrange them in a system useful to resource managers.

The classification system by which coal is classified into resource/reserve base/reserve categories on the basis of the geologic assurance of the existence of those categories and on the economic feasibility of their recovery.